Determine the total number of values of a positive integer N having at most four digits such that:

(i) The digit 1 occurs an odd number of times in N, and:

(ii) Each of the digits 2, 0 and 6 occurs an even number of times in N. (An even number includes zero), and:

(iii ) Any of the remaining six digits may or may not occur in N.

(In reply to re(2): My answers (with and without leading zeros) by Ady TZIDON)

You are absolutely correct  I did not initialize the counts of zeros, etc. for each new numbar and so the odd/even count was based on the total of all the numbers thus far.

Posted by Charlie on 2016-04-05 22:28:01